Home / 639,443.48-958,957.56-212,864.72

Finding the Fourth Proportional to 639,443.48, 958,957.56 and 212,864.72

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Solution

The fourth proportional to 639,443.48, 958,957.56 and 212,864.72 is: 319,227.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,443.48 : 958,957.56 = 212,864.72 : x
  2. Step 2: Convert to fraction form
    639,443.48/958,957.56 = 212,864.72/x
  3. Step 3: Cross multiply
    639,443.48x = 958,957.56 × 212,864.72
  4. Step 4: Simplify right side
    639,443.48x = 204,128,232,501.28
  5. Step 5: Solve for x
    x = 204,128,232,501.28/639,443.48
  6. Step 6: Final answer
    x = 319,227.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.